<strong>你猜，这个字是加粗的吗？</strong>
<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport"
        content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>网页的的标题</title>
</head>
<body>
这是网页的主体
<!--这是注释，对代码的解释说明-->
<!--Ctrl + / -->
<h1>1极标题</h1>
<h2>2极标题</h2>
<h3>3极标题</h3>
<h4>4极标题</h4>
<h5>5极标题</h5>
<h6>6级标题</h6>
</body>
</html>
